Abstract
Vibration reduction is important for dynamic systems of various kinds as high vibration amplitudes can determine the quality of the product as well as the noise and vibration emission. Frequently dynamic systems show large vibration amplitudes, especially when the system is operating near the resonance frequency or in other applications while passing through the resonance during the start-up and run-down process. With a suitable modified excitation using a variable frequency a reduction of the vibration amplitudes can be achieved, which is studied for a single degree of freedom (SDOF) oscillator and can be extended to multi-degree of freedom systems. When performing a mathematical transformation of the excitation signal the influence of the excitation parameters can be seen and for chosen parameters of the excitation the natural frequency of the system can be eliminated. It is demonstrated by computation and experiment that the vibration amplitudes can be reduced for an operation at the resonance frequency and also for the case of the passage through the resonance. The analytical results are evaluated with an experimental setup for various operation conditions and show excellent accordance.
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